Analysis of the nature of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>φ</mml:mi></mml:mrow><mml:mrow><mml:mo>→</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mi>γ</mml:mi><mml:mi>π</mml:mi><mml:mi>η</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>φ</mml:mi></mml:mrow><mml:mrow><mml:mo>→</mml:mo></mml:mrow></mml:mover></

Achasov, N. N.; Gubin, V. V.

doi:10.1103/physrevd.63.094007

Cited by 144 publications

(216 citation statements)

References 38 publications

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“…21,22 . During the experimental runs, the first-level trigger 18 selects events with energy deposition in the calorimeter more than 180 MeV and with two or more charged particles.…”

Section: Discussionmentioning

confidence: 99%

“…During the experimental runs, the first-level trigger 18 selects events with energy deposition in the calorimeter more than 180 MeV and with two or more charged particles. During processing of the experimental data the event reconstruction is performed 18,21 . For further analysis, events containing two or more photons and two charged particles with |z| < 10 cm and r < 1 cm were selected.…”

Section: Discussionmentioning

confidence: 99%

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Study of the processe+e−→π+π

et al. 2002

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Study of the process e + e − → π + π − π 0 in the energy region √ s from 0.98 to 1.38 GeV. The cross section of the process e + e − → π + π − π 0 was measured in the Spherical Neutral Detector experiment at the VEPP-2M collider in the energy region √ s = 980 ÷ 1380 MeV. The measured cross section, together with the e + e − → π + π − π 0 and ωπ + π − cross sections obtained in other experiments, was analyzed in the framework of the generalized vector meson dominance model. It was found that the experimental data can be described by a sum of ω, φ mesons and two ω ′ and ω ′′ resonances contributions, with masses m ω ′ ∼ 1490, m ω ′′ ∼ 1790 MeV and widths Γ ω ′ ∼ 1210, Γ ω ′′ ∼ 560 MeV. The analysis of the π + π − invariant mass spectra in the energy region √ s from 1100 to 1380 MeV has shown that for their description one should take into account the e + e − → ωπ 0 → π + π − π 0 mechanism also. The phase between the amplitudes corresponding to the e + e − → ωπ and e + e − → ρπ intermediate states was measured for the first time. The value of the phase is close to zero and depends on energy. I. INTRODUCTIONThe cross section of hadron production in the e + e − annihilation in the energy region √ s < 1.03 GeV can be described within the vector meson dominance model (VDM) framework and is determined by the transitions of light vector mesons (ρ, ω, φ) into the final states. The light vector mesons have been studied rather well. They are quark-antiquark qq (q = u, d, s) bound states, and their masses, widths and main decays have been measured with high accuracy 1 . The cross section for hadron production above the φ(1020) resonance ( √ s ≃ 1.03-2 GeV) cannot be described in the conventional VDM framework (taking into account ρ, ω and φ mesons only) indicating the existence of states with vector meson quantum numbers I G (J P C ) = 1 + (1 −− ), 0 − (1 −− ) and with masses of about 1450, 1650 MeV. Parameters of these states are not well established due to inaccurate and conflicting experimental data. The nature of these states is not clear either. In some reviews of experimental data they are considered as a mixture of qq with 4-quark qqqq and hybrid qqg states 2-5 . On the other hand, the experimental data do not contradict *

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“…21,22 . During the experimental runs, the first-level trigger 18 selects events with energy deposition in the calorimeter more than 180 MeV and with two or more charged particles.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Study of the processe+e−→π+π

et al. 2002

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“…Consequently, the branching ratio of φ → (f 0 , a 0 )γ can be as large as of order 10 −4 [31]. ‡ ‡ (v) It is concluded in [30] that production of f 0 (980) and a 0 (980) in the φ → γf 0 (980) → γπ 0 π 0 and φ → γa 0 (980) → γπ 0 η decays is caused by the fourquark transitions, resulting in strong restrictions on the large-N c expansions of the decay amplitudes. The analysis shows that these constraints give new evidences in favor of the four-quark picture of f 0 (980) and a 0 (980) mesons.…”

Section: Physical Properties Of Scalar Mesonsmentioning

confidence: 99%

“…§ Eqs. (3.5) and (3.9) indicate ‡ It is pointed out in [30] that the mechanism φ ≈ ss → ssγ → f 0 (980)γ without creation of and annihilation of an additional uū pair cannot explain the f 0 (980) spectrum observed in φ → γf 0 (980) → γπ 0 π 0 process because it does not contain the K + K − intermediate state. For a criticism of [29], see also the remark in the footnote [28] in the first paper of [30].…”

Section: Physical Properties Of Scalar Mesonsmentioning

confidence: 99%

HadronicDdecays involving scalar mesons

Cheng

2003

Phys. Rev. D

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The nonleptonic weak decays of charmed mesons into a scalar meson and a pseudoscalar meson are studied. The scalar mesons under consideration are σ [or f 0 (600)], κ, f 0 (980), a 0 (980) and K * 0 (1430). A consistent picture provided by the data suggests that the light scalars below or near 1 GeV form an SU(3) flavor nonet and are predominately the q 2q2 states, while the scalar mesons above 1 GeV can be described as a qq nonet. Hence, we designate q 2q2 to σ, κ, a 0 (980), f 0 (980) and qq to K * 0 . Sizable weak annihilation contributions induced from final-state interactions are essential for understanding the data. Except for the Cabibbo doubly suppressed channel D + → f 0 K + , the data of D → σπ, f 0 π, f 0 K, K * 0 π can be accommodated in the generalized factorization approach. However, the predicted rates for D → a 0 π, a 0 K are too small by one to two orders of magnitude when compared with the preliminary measurements. Whether or not one can differentiate between the two-quark and four-quark pictures for the f 0 (980) produced in the hadronic charm decays depends on the isoscalar f 0 −σ mixing angle in the qq model.

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“…In this paper, the resonance masses and couplings from (a) Martin et al [30], (b) Antonelli [32], (c) Achasov et al [33], (d) Achasov et al [33] (see Table I) are used to demonstrate the impact of their characteristic uncertainties on the calculated correlation function. [32], (c) Achasov et al [33] and (d) Achasov et al [33].…”

Section: The System Of Two Neutral Kaonsmentioning

confidence: 99%

Neutral kaon correlations in <FONT FACE=Symbol>Ö</FONT>S NN = 200 GeV Au+Au collisions at RHIC

Bekele¹,

Lednický²

2007

Braz. J. Phys.

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Results from two-K 0 s interferometry in √ s NN = 200 GeV Au+Au collisions at RHIC are presented. A model that takes into account the strong final state interaction has been used to fit the data. The effect of coupled K 0K0 and K + K − channels was studied. The value of the correlation radius parameter obtained is consistent with the transverse mass (m T ) systematics established in pion correlation measurements.

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Analysis of the nature of theφ→γπηandφ→

Cited by 144 publications

References 38 publications

Study of the processe+e−→π+π

Study of the processe+e−→π+π

HadronicDdecays involving scalar mesons

Neutral kaon correlations in <FONT FACE=Symbol>Ö</FONT>S NN = 200 GeV Au+Au collisions at RHIC

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